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The Effect of Catheter Ablation on Left Atrial Size and Function for Patients with Atrial Fibrillation: An Updated Meta-Analysis.

Xiong B, Li D, Wang J, Gyawali L, Jing J, Su L - PLoS ONE (2015)

Bottom Line: The LA diameter (LAD), maximum LA volume, and minimal LA volume were significantly decreased post-ablation, as compared with those at a pre-ablation visit.Compared with the pre-ablation outcomes, we found no significant differences in LAEF/LAAEF at a post-ablation follow-up.With CA, LA volumes and LAD were decreased significantly in patients with AF; LAEF was not significant changes in patients with PeAF but decreased in those with PAF.

View Article: PubMed Central - PubMed

Affiliation: Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China.

ABSTRACT

Background: Catheter ablation (CA) for atrial fibrillation (AF) is now an important therapeutic modality for patients with AF. However, data regarding changes in left atrial (LA) function after CA have indicated conflicting results depending on the AF types, follow-up period, and the analytical imaging tools. The objective of this review was to analyze the effect of CA on the LA size and function for patients with AF.

Methods: We searched for studies regarding LA size and function pre- and post-ablation in PubMed, Embase, the Cochrane Library, and Web of Knowledge through May 2014. LA function was measured by LA ejective fraction (LAEF), LA active ejective fraction (LAAEF), or both. Total and subgroup analyses were implemented using Cochrane Review Manager Version 5.2. Weighted mean differences with 95% confidence intervals were used to express the results of continuous outcomes using fixed or random effect models. I2 was used to calculate heterogeneity. To assess publication bias, Egger's test and Begg's funnel plot were performed using Stata 12.0.

Results: Twenty-five studies (2040 enrolled patients) were selected for this meta-analysis. The LA diameter (LAD), maximum LA volume, and minimal LA volume were significantly decreased post-ablation, as compared with those at a pre-ablation visit. Compared with the pre-ablation outcomes, we found no significant differences in LAEF/LAAEF at a post-ablation follow-up. Decreases in LA volume and LAEF remained significant post-ablation for paroxysmal AF (PAF); however, the LAEF was insignificant changes in persistent AF (PeAF). Heterogeneity was significant in spite which individual study was excluded. A publication bias was not found. In a meta-regression analysis, we did not find any factor that contributed to the heterogeneity.

Conclusion: With CA, LA volumes and LAD were decreased significantly in patients with AF; LAEF was not significant changes in patients with PeAF but decreased in those with PAF.

No MeSH data available.


Related in: MedlinePlus

A forest plot of comparison: changes in maximum left atrial volume (LAVmax) pre-ablation and post-ablation.
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pone.0129274.g003: A forest plot of comparison: changes in maximum left atrial volume (LAVmax) pre-ablation and post-ablation.

Mentions: The LAD (WMD, -0.91 mm; 95%CI, from -1.75 mm to -0.06 mm, P = 0.04; Fig 2), LAVmax (WMD, -6.48 mL; 95%CI, from -8.60 mL to -4.35 mL, P < 0.00001; Fig 3), and LAVmin (WMD, -4.17 mL; 95%CI, from -6.21 mL to -2.13 mL, P < 0.0001; Fig 4) were significantly decreased post-ablation, as compared with those pre-ablation. Nevertheless, a subgroup analysis was performed that was based on AF type; there were significant decreases in LA volumes (including LAVmax and LAVmin) for the AF patients. The LAD result indicated insignificant changes for patients with either paroxysmal or persistent AF (Figs 2–4).


The Effect of Catheter Ablation on Left Atrial Size and Function for Patients with Atrial Fibrillation: An Updated Meta-Analysis.

Xiong B, Li D, Wang J, Gyawali L, Jing J, Su L - PLoS ONE (2015)

A forest plot of comparison: changes in maximum left atrial volume (LAVmax) pre-ablation and post-ablation.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4493108&req=5

pone.0129274.g003: A forest plot of comparison: changes in maximum left atrial volume (LAVmax) pre-ablation and post-ablation.
Mentions: The LAD (WMD, -0.91 mm; 95%CI, from -1.75 mm to -0.06 mm, P = 0.04; Fig 2), LAVmax (WMD, -6.48 mL; 95%CI, from -8.60 mL to -4.35 mL, P < 0.00001; Fig 3), and LAVmin (WMD, -4.17 mL; 95%CI, from -6.21 mL to -2.13 mL, P < 0.0001; Fig 4) were significantly decreased post-ablation, as compared with those pre-ablation. Nevertheless, a subgroup analysis was performed that was based on AF type; there were significant decreases in LA volumes (including LAVmax and LAVmin) for the AF patients. The LAD result indicated insignificant changes for patients with either paroxysmal or persistent AF (Figs 2–4).

Bottom Line: The LA diameter (LAD), maximum LA volume, and minimal LA volume were significantly decreased post-ablation, as compared with those at a pre-ablation visit.Compared with the pre-ablation outcomes, we found no significant differences in LAEF/LAAEF at a post-ablation follow-up.With CA, LA volumes and LAD were decreased significantly in patients with AF; LAEF was not significant changes in patients with PeAF but decreased in those with PAF.

View Article: PubMed Central - PubMed

Affiliation: Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, The Chongqing Cardiac Arrhythmias Service Center, Chongqing, China.

ABSTRACT

Background: Catheter ablation (CA) for atrial fibrillation (AF) is now an important therapeutic modality for patients with AF. However, data regarding changes in left atrial (LA) function after CA have indicated conflicting results depending on the AF types, follow-up period, and the analytical imaging tools. The objective of this review was to analyze the effect of CA on the LA size and function for patients with AF.

Methods: We searched for studies regarding LA size and function pre- and post-ablation in PubMed, Embase, the Cochrane Library, and Web of Knowledge through May 2014. LA function was measured by LA ejective fraction (LAEF), LA active ejective fraction (LAAEF), or both. Total and subgroup analyses were implemented using Cochrane Review Manager Version 5.2. Weighted mean differences with 95% confidence intervals were used to express the results of continuous outcomes using fixed or random effect models. I2 was used to calculate heterogeneity. To assess publication bias, Egger's test and Begg's funnel plot were performed using Stata 12.0.

Results: Twenty-five studies (2040 enrolled patients) were selected for this meta-analysis. The LA diameter (LAD), maximum LA volume, and minimal LA volume were significantly decreased post-ablation, as compared with those at a pre-ablation visit. Compared with the pre-ablation outcomes, we found no significant differences in LAEF/LAAEF at a post-ablation follow-up. Decreases in LA volume and LAEF remained significant post-ablation for paroxysmal AF (PAF); however, the LAEF was insignificant changes in persistent AF (PeAF). Heterogeneity was significant in spite which individual study was excluded. A publication bias was not found. In a meta-regression analysis, we did not find any factor that contributed to the heterogeneity.

Conclusion: With CA, LA volumes and LAD were decreased significantly in patients with AF; LAEF was not significant changes in patients with PeAF but decreased in those with PAF.

No MeSH data available.


Related in: MedlinePlus